Study of devolatilization during chemical looping combustion of large coal and biomass particles

Pragadeesh, K. Sekar; Iyyaswami, Regupathi; Sudhakar, D. Ruben

doi:10.1016/j.joei.2020.01.008

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…Pragadeesh and co-workers , focused their attention on the evaluation of the devolatilization timeboth for coal and biomassunder CLC conditions. In particular, they proposed a novel technique, called the “color indistinction method” (CIM), for the determination of the devolatilization time (τ d ) in FB-CLC.…”

Section: Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

“…For conventional combustion, the correlation provided in the literature − relates devolatilization time as a function of only the particle size. Pragadeesh and co-workers proposed a new correlation that embodies the effects of other parameters such as temperature and particle shape: where A is the proportionality constant which takes into account the effects of transient mass and heat transfer within the particles and the devolatilization kinetics, d p is the particle diameter in millimeters, T is the operating FR temperature, and φ is the sphericity of particles. i , j , k are the empirical exponents of the respective parameters.…”

Section: Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

“…In addition, fuel particle characteristics have an important role to control, to a certain measure, the amount of unburnt volatiles: for small particles and high volatile contents, carbon slip to AR is almost negligible, but at the expense of lower volatiles conversion. 69 Pragadeesh and co-workers 103,104 focused their attention on the evaluation of the devolatilization timeboth for coal and biomassunder CLC conditions. In particular, they proposed a novel technique, called the "color indistinction method" (CIM), for the determination of the devolatilization time (τ d ) in FB-CLC.…”

Section: ■ Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

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Chemical Looping for Combustion of Solid Biomass: A Review

Coppola¹,

Scala

2021

Energy Fuels

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Chemical looping combustion of solid biomass has the unique potential to generate energy with negative carbon emissions, while entailing an energy penalty compared to traditional combustion that is lower than that of the competing carbon capture technologies. In spite of these attractive features, research is still needed to bring the technology to a fully commercial level. The reason relies on a number of technological challenges mostly related to the oxygen carrier performance, its possible detrimental interaction with the biomass ash components, and the efficiency of the gas–solid contact with the biomass volatiles. This review is focused on these specific challenges which are particularly relevant when firing biomass rather than coal in a solid-based chemical looping combustion process. Special attention will be given to the most recent findings published on these aspects. Related performance evaluation by modeling, system integration, and techno-economic analysis will also be briefly reviewed.

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Section: Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

Section: Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

Section: ■ Effect Of Volatiles On Bio-clcmentioning

confidence: 99%

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Chemical Looping for Combustion of Solid Biomass: A Review

Coppola¹,

Scala

2021

Energy Fuels

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“…Many researchers have carried out extensive experiments on coal/biomass mixtures using different carrier particles. Different coal/biomass fractions may improve the plant's efficiency, and such arrangements may provide additional carbon credits [15,[26][27][28][29][30][31][32] by negative carbon emission. Hence, it has the potential to lower the total cost of carbon capture.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, a mixture of coal/biomass was proposed as the immediate solution for the mitigation of CO 2 concentration. It also offers a lower cost of carbon capture than any other CO 2 capture technology [28].…”

Section: Introductionmentioning

confidence: 99%

Intensification Insights from Chemical Looping Combustion Using Coal–Biomass Mixtures with Fe-Based Oxygen Carrier

Kevat

Banerjee

2022

Processes

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Chemical looping combustion (CLC) is a modern technology that enables the mitigation of the CO2 concentration without any expense of energy. Experimental evidence shows that combustion of coal/biomass in CLC technology leads to negative carbon emission by replacing the portion of coal with biomass. In the present work, CLC was simulated using a mixture of coal/biomass in CLC; using their different proportions resulted in enhanced CO and CO2 fractions in the fuel reactor. The carbon capture and oxide oxygen fraction were also found to increase with the enhancement of the fuel reactor’s temperature with different proportions of coal/biomass. Increases in the carbon capture efficiency and oxide oxygen fraction of up to 98.86% and ~98%, respectively, were observed within the experimental temperature range. The simulated results of various parameters were predicted and validated with the published experimental results. The stated parameters were also predicted as a function of the different rates of solid circulation and gasification agents. Higher coal char conversion was confirmed in the fuel reactor with the presence of higher biomass concentrations.

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